Alpha Technologies Nexsys 600 UPS High Performance Compatible Replacement Battery Set
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⚠️ Quick Reminder
🔹 Please ensure the original battery model number is listed in our product description and that your device model number matches for compatibility.
🔹 We only supply the batteries shown in the images. Device images are provided for reference only.
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Battery Care Guide
Battery Care Guide
Battery Usage and Maintenance Guidelines 🔋
Please read the following instructions carefully before using your new battery. Proper adherence will help ensure optimal performance and extended service life.
1. Cordless Phones, PDAs, and Power Tools (NiMH, NiCd, Lithium-Ion) 📱
Initial Charge
- Fully charge the battery overnight prior to first use.
Conditioning (First 2–6 Charge Cycles)
- Operate the device until the battery reaches approximately 20% capacity.
- Avoid premature recharging.
- Do not allow the battery to fully discharge during the initial cycles.
Post-Conditioning
- Recharge the battery only when necessary.
- These batteries are capable of approximately 500 charge cycles:
- Once daily → ~500 days
Twice daily → ~250 days
Note: Even a partial recharge is considered a full cycle.
2. Sealed Lead Acid (SLA) Batteries 💡
- No conditioning required.
- Maintain the battery in a fully charged state; avoid complete discharge.
- Capable of 300–400 charge cycles.
- Expected service life: 2–3 years, depending on usage conditions.
3. Laptop Batteries (Lithium-Ion) 💻
Initial Charge
- Fully charge the battery overnight prior to first use.
Conditioning (First 2–6 Charge Cycles)
- Charge fully, then discharge to approximately 20% capacity.
- Avoid complete discharge, as some devices may not detect a fully drained battery.
Post-Conditioning
- Minimize frequent plugging and unplugging.
- Allow the battery to discharge moderately at least once per month to maintain optimal performance.
- Occasional cycling is recommended to sustain battery health.
Professional Recommendation
Adhering to these guidelines will enhance battery longevity and ensure reliable performance.
For further assistance regarding your battery or order, our customer support team is available to provide guidance.
Delivery and Shipping
Delivery and Shipping
⚡ Everything You Need to Know About Shipping with BatteryWeb (USA)
We know reliable delivery matters when you need power fast. Here’s how BatteryWeb makes shipping easy across the USA:
🚚 Shipping & Delivery
Most orders ship next business day (some products like sealed lead acid may take a little longer).
Same-day shipping available if you order before 11:59 AM (delivery depends on the carrier).
We ship nationwide using FedEx, UPS, USPS, DHL, and regional ground carriers.
Shipping costs are calculated automatically at checkout based on weight, distance, and carrier.
Transit times shown are estimates only (business days, no weekends/holidays).
🌍 Shipping Restrictions
Lithium batteries cannot be shipped by USPS or air. They must go via FedEx Ground, UPS Ground, or DHL Ground.
PO Box deliveries are only available via USPS.
At this time, we do not ship lithium batteries to Puerto Rico. NiMH, NiCd, and Alkaline can be shipped.
📦 Important Notes
Double-check your shipping address! If an incorrect address is used and the order is returned, re-shipping costs are the buyer’s responsibility.
If a product is temporarily out of stock, we’ll notify you right away with the expected restock date—or issue a refund if you prefer.
💲 Currency & Pricing
All prices are shown in USD.
Orders shipped outside the USA may be subject to local taxes, customs fees, or import duties. These are the buyer’s responsibility.
⚡ At BatteryWeb, we’re committed to getting your batteries delivered quickly, safely, and affordably—so you’ll always have the power you need, when you need it.
Disclaimer
Disclaimer
⚠️ Disclaimer: All product names, trademarks, and registered trademarks belong to their respective owners.
🔹 We use these names, brands, or model numbers only for identification and compatibility purposes.
🔹 Our products are generic replacement parts and are not affiliated with, endorsed by, or manufactured by the original equipment manufacturers (OEMs).
Volts & Amps
12 Volts | 18 Ah
Terminal Type
Nut & Bolt
SigmasTek SP12-18HR Replacement Battery Set for Alpha Technologies Nexsys 600
Built for compatibility with the Alpha Technologies Nexsys 600, this replacement UPS battery set offers dependable, high-rate discharge performance and consistent factory-new reliability. Each order contains two SigmasTek SP12-18HR batteries (12 Volts, 18 AH) engineered to restore runtime and protection to your Nexsys 600. Please reuse all original cables and hardware when installing these replacement batteries.
Key Specifications
- Battery set includes: 2 x SigmasTek SP12-18HR
- Voltage: 12 Volts
- Capacity: 18 AH (amp-hours)
- Battery chemistry/design: High Rate Discharge Design
- Construction: Valve Regulated Spill Proof Construction
- Self-discharge: Low Self-discharge
- Vibration resistance: High Vibration Resistance
- Certifications: U.L. Recognized and CE Certified
- Condition: Brand New, Factory Fresh
- Warranty: 1 Year Warranty
- Terminal type: Nut & Bolt
- Brand: SigmasTek (replacement for Alpha Technologies)
- Compatible with: Alpha Technologies Nexsys 600 Uninterruptible Power Supply (UPS) unit
- Typical applications: Uninterruptible Power Supply (UPS) Units, Emergency Power Supply, Battery Powered Tools
Benefits
- Durability: Valve-regulated, spill-proof construction and high vibration resistance provide a rugged, reliable solution for UPS installations and mobile applications.
- Long life: Low self-discharge ensures stored capacity remains available, delivering a long-lasting battery that performs when called upon.
- High performance: As a high-performance UPS battery, the SP12-18HR is optimized for high-rate discharge, supplying bursts of power needed by the Nexsys 600 during outages.
- Quality assurance: Each replacement UPS battery is factory-new and tested to meet or exceed OEM expectations for performance and runtime.
- Application flexibility: Suitable for UPS back-up, emergency power systems, and battery-operated tools requiring 12V 18AH support.
- Easy installation: Intended to be used with the original cables and hardware, enabling quick replacement by maintenance staff or technicians.
Replace your Alpha Technologies Nexsys 600 batteries with confidence. Order this long-lasting battery set today for reliable backup power and fast dispatch for in-stock items.
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